Default [Q] Microphone Speaker Bottom not Working

Hi guys i find myself having to repair my motorola xt890 just bought used.

Disassembling the phone I realize that someone has already previously tried to fix it because there is a little scorched area.
I realize that the logic board is broken in several places,and perhaps this has caused the breaking of links.

Initial situation

speaker removed

back motherboard

you think it is possible to connect directly to the source chip? how can I do?